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Is this a vertebra?
(files.catbox.moe)
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
They sell them cut like that as dog treats, with the hole packed with food. Probably either dragged out as a treat for some camper's dog or scavenged by wildlife and abandoned when the good stuff was gone.